Along Mr. Obama's motorcade route form the airport to a hotel, crowds of people lined the streets, some waving small American flags.

Mr. Obama's trip to Sweden will mark the first bilateral visit by a sitting U.S. president to the northern European nation. While in Stockholm, Mr. Obama will meet with Reinfeldt and King Carl XVI Gustav and dine with Nordic leaders from Norway, Iceland, Finland and Denmark. He'll also stop at Sweden's premier technical university to call attention to Sweden's goal to phase out fossil fuels by 2050.